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Table 2 PTV stratification rules

From: Intensity-modulated stereotactic radiosurgery for arteriovenous malformations: guidance for treatment planning

 

Characteristics of potential benefit with IMRT

PTV conformity

NT max dose

7Gy isodose vol.

12Gy isodose vol.

PTV stratification rules

Diameter

<2.25 cm

>2.5 cm

>3.0 cm

>2.9 cm

Volume

N/A

N/A

>5.0 cc

N/A

Vol./SA

<0.25 cm

N/A

N/A

N/A

Predicted improvement

−0.06-0.68

−0.5-12.3 %

1.0-7.952 cc

−0.024-3.704 cc

  1. PTV stratification rules and predicted improvements for patient benefit with the use of IMRT for the treatment of AVMs. The predicted improvements are the ranges obtained within this study for patients whose lesion characteristics satisfy the rules concerning each dosimetric parameter stated above. Within these rules, the boxes labeled “N/A” for the corresponding PTV characteristic depict no clear boundary defining patient benefit resulting in the inability for patient stratification to be achieved.
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Radiation Oncology

ISSN: 1748-717X

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